An electromagnetic coil with improved insulation properties at high temperatures. A bobbin is insulated by a thin ceramic composite layer that is produced by winding a glass or ceramic fiber over the support structure and impregnating it with a pre-ceramic polymer. The pre-ceramic polymer is then modified to form a ceramic SiO.sub.2 matrix around the fibrous layer. The ceramic matrix secures the glass or ceramic fibers in place and produces a dense layer. A ceramic coated magnet wire is then wound around the insulated support structure. The magnet wire is a conductor that is spiral-wrapped with a glass fiber impregnated with a pre-ceramic polymer.

Embodiments of the invention are directed to methods, devices, and compositions for 3D printing of piezoelectric devices. The piezoelectric devices can be used for sensor applications using poly(vinylidene) fluoride (PVDF) and BaTiO.sub.3 (BTO) nanocomposites through in-situ electric poling 3D printing process.

A pre-preg product, such as a tape or sheet suitable for forming a composite having reinforcement fibers and a liquid crystal thermoset (LCT) precursor is provided. Further aspects of the invention are directed to a method for preparation of the pre-preg product and to composite products based on the pre-preg product.

A disclosed resin transfer molding process includes inserting a ceramic article within a bladder defining a part cavity, inserting the bladder including the ceramic article into a second cavity with a fixed geometry, and pressurizing the bladder against the ceramic article. The method further includes injecting resin into the ceramic article within the bladder with the bladder against the ceramic article to maintain resin within the ceramic article during curing.

A three-dimensional (3D) printing composition includes ceramic filaments comprising an additive having an aspect ratio of at least 2:1. 3D printed ceramic articles include the ceramic filaments.

A joining method for joining a first member having a hole that is opened on at least one surface, to a second member including a material of which a melting temperature is lower than that of a constituent material of the first member, includes: laminating the second member on the first member so as to cover an opening of the hole; and introducing that material of the second member which is softened or melted into the hole through the opening and curing the material of the second member.

A joining method for joining a first member having a hole that is opened on at least one surface, to a second member including a material of which a melting temperature is lower than that of a constituent material of the first member, includes: laminating the second member on the first member so as to cover an opening of the hole; and introducing that material of the second member which is softened or melted into the hole through the opening and curing the material of the second member.

A bed board for a diagnostic bed of a medical examination apparatus is formed in a material that includes basalt fibers. The bed board may have a bed board body composed of basalt fibers and a filler in a predetermined ratio, or may be formed by a hollow shell, composed of basalt fibers and a binder in a predetermined ratio, with the hollow shell being filled by a filler material.

The present invention relates to a sinter powder (SP) comprising 58.5% to 99.95% by weight of at least one thermoplastic polyurethane (A), 0.05% to 1.5% by weight of at least one flow agent (B), 0% to 5% by weight of at least one organic additive (C), 0% to 5% by weight of at least one further additive (D) and 0% to 30% by weight of at least one reinforcer (E), based in each case on the sum total of the percentages by weight (A), (B), (C), (D) and (E), wherein the thermoplastic polyurethane (A) is prepared by reacting at least one isocyanate (a), at least one isocyanate-reactive compound (b), and at least one chain extender (c), and wherein components (a), (b) and (c) each comprise not more than 15 mol-% of aromatic moieties, based on the total amount of the respective component (a), (b) and (c). The present invention further relates to a method of producing the sinter powder (SP) and to the use of the sinter powder (SP) in a three-dimensional (3D) printing process. The present invention further relates to a three-dimensional shaped article comprising the thermoplastic polyurethane (A), to a method of producing a three-dimensional shaped article and to the use of the at least one thermoplastic polyurethane (A) in a three-dimensional (3D) printing process for producing a three-dimensional shaped article to improve the energy return of the three-dimensional shaped article.

A pre-ceramic support structure for additive manufacturing, that upon thermal processing, is soluble in various solvents.